Reverse Engineering Call Of Duty Anti-Cheat

I always thought the hard problems in game dev are, you know, having realistic physics, ray tracing or making you fall in love with Lara Croft, but no.

It's anti-cheat techniques. Some of the techniques in the post absolutely blew my mind. And to think that games run as fast as they do while wasting so much precious CPU cycles on catching cheats really puts into perspective the amount of optimisation folks do there.